Affect alpha shadow of wrapper material for base material?

V-Ray for 3ds Max V-Ray for 3ds Max :: General
2

Please forward Rhino related questions to the V-Ray for Rhino section of the forum.
Furthermore VRayWrapperMtl material is specially created to be used for footage matching.
In case you want to extract the shadow from plane with non mate property you can set a VrayShadow pass. Which you can later merge with the alpha channel.